Science: Cold Power

In experiment several methods work
successfully to produce electricity other than by fuel or waterfall.
Rising and falling tides contain huge power; hence a project is
under way for dams and spillways where Maine and New Brunswick meet at
Passamaquoddy Bay. The sun pours billions of heat units upon the earth;
hence an experimental sun engine at Mount Wilson Observatory. Volcanic
regions are hot just below the ground surface; hence on the west U.
S. Coast and in Italy pipes are driven down, water poured into them,
useful steam taken out. The surface...